…atter what it was
The SMTP::getLastReply() result is not populated in case of server error.
Truth be said, it should, for consistency's sake at the very least.
But real reason is that writing something like
if(!$inst->data($_message))
throw new Exception('DATA command unsuccessful. Last server reply: ' . $inst->getLastReply());
is an order of magnitude cleaner, than a tantric dance with array values (you have to turn SMTP::getError() method call into variable somewhere first, too!)…
One day, someone have to turn all this into proper exceptions...

1. Completed new language key $PHPMAILER_LANG['extension_missing'].
2. fix translation error of $PHPMAILER_LANG['signing'] with correct meaning in Traditional Chinese
3. Re-order the translation keys to make it the same with default english locale.

+Many PHP developers utilize email in their code. The only PHP function that supports this is the mail() function. However, it does not provide any assistance for making use of popular features such as HTML-based emails and attachments.

+*Please* don't be tempted to do it yourself - if you don't use PHPMailer, there are many other excellent libraries that you should look at before rolling your own - try SwiftMailer, Zend_Mail, eZcomponents etc.

+

+The PHP mail() function usually sends via a local mail server, typically fronted by a `sendmail` binary on Linux, BSD and OS X platforms, however, Windows usually doesn't include a local mail server; PHPMailer's integrated SMTP implementation allows email sending on Windows platforms without a local mail server.

+

+##License

+

+This software is distributed under the [LGPL 2.1](http://www.gnu.org/licenses/lgpl-2.1.html) license. Please read LICENSE for information on the

+software availability and distribution.

+

+##Installation & loading

+

+PHPMailer is available via [Composer/Packagist](https://packagist.org/packages/phpmailer/phpmailer) (using semantic versioning), so just add this line to your `composer.json` file:

+

+ "phpmailer/phpmailer": "~5.2"

+

+Alternatively, copy the contents of the PHPMailer folder into somewhere that's in your PHP `include_path` setting. If you don't speak git or just want a tarball, click the 'zip' button at the top of the page in GitHub.

+

+If you're not using composer's autoloader, PHPMailer provides an SPL-compatible autoloader, and that is the preferred way of loading the library - just `require '/path/to/PHPMailerAutoload.php';` and everything should work. The autoloader does not throw errors if it can't find classes so it prepends itself to the SPL list, allowing your own (or your framework's) autoloader to catch errors. SPL autoloading was introduced in PHP 5.1.0, so if you are using a version older than that you will need to require/include each class manually.

+

+PHPMailer does *not* declare a namespace because namespaces were only introduced in PHP 5.3.

+

+###Minimal installation

+

+While installing the entire package manually or with composer is simple, convenient and reliable, you may want to include only vital files in your project. At the very least you will need [class.phpmailer.php](class.phpmailer.php). If you're using SMTP, you'll need [class.smtp.php](class.smtp.php), and if you're using POP-before SMTP, you'll need [class.pop3.php](class.pop3.php). For all of these, we recommend you use [the autoloader](PHPMailerAutoload.php) too as otherwise you will either have to `require` all classes manually or use some other autoloader. You can skip the [language](language/) folder if you're not showing errors to users and can make do with English-only errors. You may need the additional classes in the [extras](extras/) folder if you are using those features, including NTLM authentication and ics generation.

+$mail->AltBody = 'This is the body in plain text for non-HTML mail clients';

+

+if(!$mail->send()) {

+ echo 'Message could not be sent.';

+ echo 'Mailer Error: ' . $mail->ErrorInfo;

+} else {

+ echo 'Message has been sent';

+}

+```

+

+You'll find plenty more to play with in the [examples](examples/) folder.

+

+That's it. You should now be ready to use PHPMailer!

+

+##Localization

+PHPMailer defaults to English, but in the [language](language/) folder you'll find numerous (46 at the time of writing!) translations for PHPMailer error messages that you may encounter. Their filenames contain [ISO 639-1](http://en.wikipedia.org/wiki/ISO_639-1) language code for the translations, for example `fr` for French. To specify a language, you need to tell PHPMailer which one to use, like this:

+

+```php

+// To load the French version

+$mail->setLanguage('fr', '/optional/path/to/language/directory/');

+```

+

+We welcome corrections and new languages - if you're looking for corrections to do, run the [phpmailerLangTest.php](test/phpmailerLangTest.php) script in the tests folder and it will show any missing translations.

+

+##Documentation

+

+Examples of how to use PHPMailer for common scenarios can be found in the [examples](examples/) folder. If you're looking for a good starting point, we recommend you start with [the gmail example](examples/gmail.phps).

+

+There are tips and a troubleshooting guide in the [GitHub wiki](https://github.com/PHPMailer/PHPMailer/wiki). If you're having trouble, this should be the first place you look as it's the most frequently updated.

+You'll find some basic user-level docs in the [docs](docs/) folder, and you can generate complete API-level documentation using the [generatedocs.sh](docs/generatedocs.sh) shell script in the docs folder, though you'll need to install [PHPDocumentor](http://www.phpdoc.org) first. You may find [the unit tests](test/phpmailerTest.php) a good source of how to do various operations such as encryption.

+

+If the documentation doesn't cover what you need, search the [many questions on StackOverflow](http://stackoverflow.com/questions/tagged/phpmailer), and before you ask a question about "SMTP Error: Could not connect to SMTP host.", [read the troubleshooting guide](https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting).